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9,927
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Media Type
3
collections
8,905
texts
454
movies
444
audio
56
data
44
images
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Topics & Subjects
4,396
NASA Technical Reports Server (NTRS)
3,132
Astronomy
992
astronomy
899
X RAY ASTRONOMY
704
ASTRONOMY
657
SPACEBORNE ASTRONOMY
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Collection
4,396
NASA Network Resource and Training Site
1,930
American Libraries
577
Canadian Libraries
430
NASA Technical Documents
378
Folkscanomy: A Library of Books
371
Community Audio
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Creator
4,396
nasa technical reports server (ntrs)
353
eric
129
joe lalumia
88
humboldt, alexander von, 1769-1859
77
defense technical information center
57
france. ministère de l'éducation nationale
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Language
7,673
English
367
German
363
French
222
Latin
79
Italian
52
undetermined
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